当然，实际上你必须有电源供应，用以维持磁场。
Of course, I mean, you actually have to take some power supply to maintain the magnetic fields.
项目在计算机切换到一个可维持十分钟的紧急电源后被挽救了。
The project was saved when the computer switched to an emergency 10-minute back-up power source.
然而研制这种微小、轻型的飞行器是很困难的，因为必须要有如板载电池这样的电源供电才能维持它的飞行。
But building a tiny, lightweight flying robot is tough when you need a power supply — like an onboard battery — to keep the MAV flying.
他说到，“所以只要保持控制电源有电，我们的变频器就能够在停电时维持运转。”
So our VFDs have been able to ride through these outages, as long as we keep the control power active.
合上盖子也自动切断电源以维持电池的使用寿命。
Closing the lid also shuts off the power automatically to preserve battery life.
应急发电机和应急配电板能在主电源失灵的情况下维持电力供应。
The emergency generator and switchboard can keep power supply in case of failure of main power supply.
的可靠性和在许多工业应用这些系统的可用性是至关重要的管理操作或维持在主电源或黑褐色出局出局操作。
The reliability and availability of these systems in many industrial applications is critical to manage operations or maintain operations during mains power brown outs or black outs.
而信号远离电源电压后，再维持放大器的共模抑制是不必要的，需要的却是不为瞬间过电压所毁坏的条件。
It is not necessary that AMPLIFIERs maintain common-mode rejection for signals beyond the supply voltages: what is required is that they do not self-destruct for momentary overvoltage conditions.
它由两组电源构成：维持电弧燃烧的大功率低压电源和执行再引弧的小功率高压电源。
It consists of two sources: low voltage high power source which puts the arc maintenance into practice and high voltage low power source which carries out the arc reignition.
用35英镑（156牛顿）的同方向拉力作用于出气冒口的电源线，维持一分钟，从而使电源线的移动行程最大。
A 35 lb (156 N) force was applied for a period of 1 min to the supply cord at the strain relief in a direction to cause the greatest movement of the cord.
同步发电机是电力系统中重要的电源，提高和维持同步发电机运行的稳定性，是保证电力系统安全、经济运行的基本条件之一。
In power system, enhancing and maintaining synchronous generators stability is one of the basic conditions to ensure safe and economical power system operation.
在t1期间，通过半导体闸流管维持一反向电压，并且正是在这之后，设备易于保持一正向电压，而无需开启电源。
During t1 a reverse voltage must be maintained across the thruster and only after this time is the device capable of blocking a forward voltage without going into its on-state.
在t1期间，通过半导体闸流管维持一反向电压，并且正是在这之后，设备易于保持一正向电压，而无需开启电源。
During t1 a reverse voltage must be maintained across the thruster and only after this time is the device capable of blocking a forward voltage without going into its on-state.
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